Commit message: 8281866: Enhance MethodHandle invocations

Reviewed-by: mbaesken
Backport-of: d974d9da365f787f67971d88c79371c8b0769f75
CVE: CVE-2022-21541
CWE: NVD-CWE-noinfo
Vulnerability description: Vulnerability in the Oracle Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Hotspot). Supported versions that are affected are Oracle Java SE: 7u343, 8u333, 11.0.15.1, 17.0.3.1, 18.0.1.1; Oracle GraalVM Enterprise Edition: 20.3.6, 21.3.2 and 22.1.0. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Java SE, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability can also be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. CVSS 3.1 Base Score 5.9 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N).

Project: jdk11u
File: linkResolver.cpp

methodHandle LinkResolver::resolve_virtual_call_or_null(
                                                 Klass* receiver_klass,
                                                 const LinkInfo& link_info) {
  EXCEPTION_MARK;
  CallInfo info;
  resolve_virtual_call(info, Handle(), receiver_klass, link_info, false, THREAD);
  if (HAS_PENDING_EXCEPTION) {
    CLEAR_PENDING_EXCEPTION;
    return methodHandle();
  }
  return info.selected_method();
}

Project: jdk11u
File: linkResolver.cpp

void CallInfo::set_handle(const methodHandle& resolved_method,
                          Handle resolved_appendix,
                          Handle resolved_method_type, TRAPS) {
  set_handle(SystemDictionary::MethodHandle_klass(), resolved_method, resolved_appendix, resolved_method_type, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_invokehandle(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
  // This guy is reached from InterpreterRuntime::resolve_invokehandle.
  LinkInfo link_info(pool, index, CHECK);
  if (TraceMethodHandles) {
    ResourceMark rm(THREAD);
    tty->print_cr("resolve_invokehandle %s %s", link_info.name()->as_C_string(),
                  link_info.signature()->as_C_string());
  }
  resolve_handle_call(result, link_info, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_invokedynamic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
  Symbol* method_name       = pool->name_ref_at(index);
  Symbol* method_signature  = pool->signature_ref_at(index);
  Klass* current_klass = pool->pool_holder();

  // Resolve the bootstrap specifier (BSM + optional arguments).
  Handle bootstrap_specifier;
  // Check if CallSite has been bound already:
  ConstantPoolCacheEntry* cpce = pool->invokedynamic_cp_cache_entry_at(index);
  int pool_index = cpce->constant_pool_index();

  if (cpce->is_f1_null()) {
    if (cpce->indy_resolution_failed()) {
      ConstantPool::throw_resolution_error(pool,
                                           ResolutionErrorTable::encode_cpcache_index(index),
                                           CHECK);
    }

    // The initial step in Call Site Specifier Resolution is to resolve the symbolic
    // reference to a method handle which will be the bootstrap method for a dynamic
    // call site.  If resolution for the java.lang.invoke.MethodHandle for the bootstrap
    // method fails, then a MethodHandleInError is stored at the corresponding bootstrap
    // method's CP index for the CONSTANT_MethodHandle_info.  So, there is no need to
    // set the indy_rf flag since any subsequent invokedynamic instruction which shares
    // this bootstrap method will encounter the resolution of MethodHandleInError.
    oop bsm_info = pool->resolve_bootstrap_specifier_at(pool_index, THREAD);
    Exceptions::wrap_dynamic_exception(CHECK);
    assert(bsm_info != NULL, "");
    // FIXME: Cache this once per BootstrapMethods entry, not once per CONSTANT_InvokeDynamic.
    bootstrap_specifier = Handle(THREAD, bsm_info);
  }
  if (!cpce->is_f1_null()) {
    methodHandle method(     THREAD, cpce->f1_as_method());
    Handle       appendix(   THREAD, cpce->appendix_if_resolved(pool));
    Handle       method_type(THREAD, cpce->method_type_if_resolved(pool));
    result.set_handle(method, appendix, method_type, THREAD);
    Exceptions::wrap_dynamic_exception(CHECK);
    return;
  }

  if (TraceMethodHandles) {
    ResourceMark rm(THREAD);
    tty->print_cr("resolve_invokedynamic #%d %s %s in %s",
                  ConstantPool::decode_invokedynamic_index(index),
                  method_name->as_C_string(), method_signature->as_C_string(),
                  current_klass->name()->as_C_string());
    tty->print("  BSM info: "); bootstrap_specifier->print();
  }

  resolve_dynamic_call(result, pool_index, bootstrap_specifier, method_name,
                       method_signature, current_klass, THREAD);
  if (HAS_PENDING_EXCEPTION && PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
    int encoded_index = ResolutionErrorTable::encode_cpcache_index(index);
    bool recorded_res_status = cpce->save_and_throw_indy_exc(pool, pool_index,
                                                             encoded_index,
                                                             pool()->tag_at(pool_index),
                                                             CHECK);
    if (!recorded_res_status) {
      // Another thread got here just before we did.  So, either use the method
      // that it resolved or throw the LinkageError exception that it threw.
      if (!cpce->is_f1_null()) {
        methodHandle method(     THREAD, cpce->f1_as_method());
        Handle       appendix(   THREAD, cpce->appendix_if_resolved(pool));
        Handle       method_type(THREAD, cpce->method_type_if_resolved(pool));
        result.set_handle(method, appendix, method_type, THREAD);
        Exceptions::wrap_dynamic_exception(CHECK);
      } else {
        assert(cpce->indy_resolution_failed(), "Resolution failure flag not set");
        ConstantPool::throw_resolution_error(pool, encoded_index, CHECK);
      }
      return;
    }
    assert(cpce->indy_resolution_failed(), "Resolution failure flag wasn't set");
  }
}

Project: jdk11u
File: linkResolver.cpp

methodHandle LinkResolver::linktime_resolve_interface_method_or_null(
                                                 const LinkInfo& link_info) {
  EXCEPTION_MARK;
  methodHandle method_result = linktime_resolve_interface_method(link_info, THREAD);
  if (HAS_PENDING_EXCEPTION) {
    CLEAR_PENDING_EXCEPTION;
    return methodHandle();
  } else {
    return method_result;
  }
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::throw_abstract_method_error(const methodHandle& resolved_method,
                                               const methodHandle& selected_method,
                                               Klass *recv_klass, TRAPS) {
  Klass *resolved_klass = resolved_method->method_holder();
  ResourceMark rm(THREAD);
  stringStream ss;

  if (recv_klass != NULL) {
    ss.print("Receiver class %s does not define or inherit an "
             "implementation of the",
             recv_klass->external_name());
  } else {
    ss.print("Missing implementation of");
  }

  assert(resolved_method.not_null(), "Sanity");
  ss.print(" resolved method '%s%s",
           resolved_method->is_abstract() ? "abstract " : "",
           resolved_method->is_private()  ? "private "  : "");
  resolved_method->signature()->print_as_signature_external_return_type(&ss);
  ss.print(" %s(", resolved_method->name()->as_C_string());
  resolved_method->signature()->print_as_signature_external_parameters(&ss);
  ss.print(")' of %s %s.",
           resolved_klass->external_kind(),
           resolved_klass->external_name());

  if (selected_method.not_null() && !(resolved_method == selected_method)) {
    ss.print(" Selected method is '%s%s",
             selected_method->is_abstract() ? "abstract " : "",
             selected_method->is_private()  ? "private "  : "");
    selected_method->print_external_name(&ss);
    ss.print("'.");
  }

  THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_invoke(CallInfo& result, Handle& recv,
                             const methodHandle& attached_method,
                             Bytecodes::Code byte, TRAPS) {
  Klass* defc = attached_method->method_holder();
  Symbol* name = attached_method->name();
  Symbol* type = attached_method->signature();
  LinkInfo link_info(defc, name, type);
  switch(byte) {
    case Bytecodes::_invokevirtual:
      resolve_virtual_call(result, recv, recv->klass(), link_info,
                           /*check_null_and_abstract=*/true, CHECK);
      break;
    case Bytecodes::_invokeinterface:
      resolve_interface_call(result, recv, recv->klass(), link_info,
                             /*check_null_and_abstract=*/true, CHECK);
      break;
    case Bytecodes::_invokestatic:
      resolve_static_call(result, link_info, /*initialize_class=*/false, CHECK);
      break;
    case Bytecodes::_invokespecial:
      resolve_special_call(result, recv, link_info, CHECK);
      break;
    default:
      fatal("bad call: %s", Bytecodes::name(byte));
      break;
  }
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_invokestatic(CallInfo& result, const constantPoolHandle& pool, int index, TRAPS) {
  LinkInfo link_info(pool, index, CHECK);
  resolve_static_call(result, link_info, /*initialize_class*/true, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_invokespecial(CallInfo& result, Handle recv,
                                         const constantPoolHandle& pool, int index, TRAPS) {
  LinkInfo link_info(pool, index, CHECK);
  resolve_special_call(result, recv, link_info, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

Method* LinkResolver::lookup_method_in_interfaces(const LinkInfo& cp_info) {
  InstanceKlass *ik = InstanceKlass::cast(cp_info.resolved_klass());

  // Specify 'true' in order to skip default methods when searching the
  // interfaces.  Function lookup_method_in_klasses() already looked for
  // the method in the default methods table.
  return ik->lookup_method_in_all_interfaces(cp_info.name(), cp_info.signature(), Klass::skip_defaults);
}

Project: jdk11u
File: linkResolver.cpp

methodHandle LinkResolver::resolve_method(const LinkInfo& link_info,
                                          Bytecodes::Code code, TRAPS) {

  Handle nested_exception;
  Klass* resolved_klass = link_info.resolved_klass();

  // 1. For invokevirtual, cannot call an interface method
  if (code == Bytecodes::_invokevirtual && resolved_klass->is_interface()) {
    ResourceMark rm(THREAD);
    char buf[200];
    jio_snprintf(buf, sizeof(buf), "Found interface %s, but class was expected",
        resolved_klass->external_name());
    THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
  }

  // 2. check constant pool tag for called method - must be JVM_CONSTANT_Methodref
  if (!link_info.tag().is_invalid() && !link_info.tag().is_method()) {
    ResourceMark rm(THREAD);
    stringStream ss;
    ss.print("Method '");
    Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
    ss.print("' must be Methodref constant");
    THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
  }

  // 3. lookup method in resolved klass and its super klasses
  methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, true, false));

  // 4. lookup method in all the interfaces implemented by the resolved klass
  if (resolved_method.is_null() && !resolved_klass->is_array_klass()) { // not found in the class hierarchy
    resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));

    if (resolved_method.is_null()) {
      // JSR 292:  see if this is an implicitly generated method MethodHandle.linkToVirtual(*...), etc
      resolved_method = lookup_polymorphic_method(link_info, (Handle*)NULL, (Handle*)NULL, THREAD);
      if (HAS_PENDING_EXCEPTION) {
        nested_exception = Handle(THREAD, PENDING_EXCEPTION);
        CLEAR_PENDING_EXCEPTION;
      }
    }
  }

  // 5. method lookup failed
  if (resolved_method.is_null()) {
    ResourceMark rm(THREAD);
    stringStream ss;
    ss.print("'");
    Method::print_external_name(&ss, resolved_klass, link_info.name(), link_info.signature());
    ss.print("'");
    THROW_MSG_CAUSE_(vmSymbols::java_lang_NoSuchMethodError(),
                     ss.as_string(), nested_exception, NULL);
  }

  // 6. access checks, access checking may be turned off when calling from within the VM.
  Klass* current_klass = link_info.current_klass();
  if (link_info.check_access()) {
    assert(current_klass != NULL , "current_klass should not be null");

    // check if method can be accessed by the referring class
    check_method_accessability(current_klass,
                               resolved_klass,
                               resolved_method->method_holder(),
                               resolved_method,
                               CHECK_NULL);

    // check loader constraints
    check_method_loader_constraints(link_info, resolved_method, "method", CHECK_NULL);
  }

  return resolved_method;
}

Project: jdk11u
File: linkResolver.cpp

static void trace_method_resolution(const char* prefix,
                                    Klass* klass,
                                    Klass* resolved_klass,
                                    const methodHandle& method,
                                    bool logitables,
                                    int index = -1) {
#ifndef PRODUCT
  ResourceMark rm;
  Log(itables) logi;
  LogStream lsi(logi.trace());
  Log(vtables) logv;
  LogStream lsv(logv.trace());
  outputStream* st;
  if (logitables) {
    st = &lsi;
  } else {
    st = &lsv;
  }
  st->print("%s%s, compile-time-class:%s, method:%s, method_holder:%s, access_flags: ",
            prefix,
            (klass == NULL ? "<NULL>" : klass->internal_name()),
            (resolved_klass == NULL ? "<NULL>" : resolved_klass->internal_name()),
            Method::name_and_sig_as_C_string(resolved_klass,
                                             method->name(),
                                             method->signature()),
            method->method_holder()->internal_name());
  method->print_linkage_flags(st);
  if (index != -1) {
    st->print("vtable_index:%d", index);
  }
  st->cr();
#endif // PRODUCT
}

Project: jdk11u
File: linkResolver.cpp

void LinkInfo::print() {
  ResourceMark rm;
  tty->print_cr("Link resolved_klass=%s name=%s signature=%s current_klass=%s check_access=%s",
                _resolved_klass->name()->as_C_string(),
                _name->as_C_string(),
                _signature->as_C_string(),
                _current_klass == NULL ? "(none)" : _current_klass->name()->as_C_string(),
                _check_access ? "true" : "false");
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_interface_call(CallInfo& result, Handle recv, Klass* recv_klass,
                                          const LinkInfo& link_info,
                                          bool check_null_and_abstract, TRAPS) {
  // throws linktime exceptions
  methodHandle resolved_method = linktime_resolve_interface_method(link_info, CHECK);
  runtime_resolve_interface_method(result, resolved_method,link_info.resolved_klass(),
                                   recv, recv_klass, check_null_and_abstract, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

methodHandle LinkResolver::resolve_interface_method(const LinkInfo& link_info, Bytecodes::Code code, TRAPS) {

  Klass* resolved_klass = link_info.resolved_klass();

  // check if klass is interface
  if (!resolved_klass->is_interface()) {
    ResourceMark rm(THREAD);
    char buf[200];
    jio_snprintf(buf, sizeof(buf), "Found class %s, but interface was expected", resolved_klass->external_name());
    THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
  }

  // check constant pool tag for called method - must be JVM_CONSTANT_InterfaceMethodref
  if (!link_info.tag().is_invalid() && !link_info.tag().is_interface_method()) {
    ResourceMark rm(THREAD);
    stringStream ss;
    ss.print("Method '");
    Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
    ss.print("' must be InterfaceMethodref constant");
    THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
  }

  // lookup method in this interface or its super, java.lang.Object
  // JDK8: also look for static methods
  methodHandle resolved_method(THREAD, lookup_method_in_klasses(link_info, false, true));

  if (resolved_method.is_null() && !resolved_klass->is_array_klass()) {
    // lookup method in all the super-interfaces
    resolved_method = methodHandle(THREAD, lookup_method_in_interfaces(link_info));
  }

  if (resolved_method.is_null()) {
    // no method found
    ResourceMark rm(THREAD);
    stringStream ss;
    ss.print("'");
    Method::print_external_name(&ss, resolved_klass, link_info.name(), link_info.signature());
    ss.print("'");
    THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(), ss.as_string());
  }

  if (link_info.check_access()) {
    // JDK8 adds non-public interface methods, and accessability check requirement
    Klass* current_klass = link_info.current_klass();

    assert(current_klass != NULL , "current_klass should not be null");

    // check if method can be accessed by the referring class
    check_method_accessability(current_klass,
                               resolved_klass,
                               resolved_method->method_holder(),
                               resolved_method,
                               CHECK_NULL);

    check_method_loader_constraints(link_info, resolved_method, "interface method", CHECK_NULL);
  }

  if (code != Bytecodes::_invokestatic && resolved_method->is_static()) {
    ResourceMark rm(THREAD);
    stringStream ss;
    ss.print("Expected instance not static method '");
    Method::print_external_name(&ss, resolved_klass,
                                resolved_method->name(), resolved_method->signature());
    ss.print("'");
    THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
  }

  if (log_develop_is_enabled(Trace, itables)) {
    char buf[200];
    jio_snprintf(buf, sizeof(buf), "%s resolved interface method: caller-class:",
                 Bytecodes::name(code));
    trace_method_resolution(buf, link_info.current_klass(), resolved_klass,
                            resolved_method, true);
  }

  return resolved_method;
}

Project: jdk11u
File: linkResolver.cpp

methodHandle LinkResolver::linktime_resolve_special_method(const LinkInfo& link_info,
                                                           TRAPS) {

  // Invokespecial is called for multiple special reasons:
  // <init>
  // local private method invocation, for classes and interfaces
  // superclass.method, which can also resolve to a default method
  // and the selected method is recalculated relative to the direct superclass
  // superinterface.method, which explicitly does not check shadowing
  Klass* resolved_klass = link_info.resolved_klass();
  methodHandle resolved_method;

  if (!resolved_klass->is_interface()) {
    resolved_method = resolve_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
  } else {
    resolved_method = resolve_interface_method(link_info, Bytecodes::_invokespecial, CHECK_NULL);
  }

  // check if method name is <init>, that it is found in same klass as static type
  if (resolved_method->name() == vmSymbols::object_initializer_name() &&
      resolved_method->method_holder() != resolved_klass) {
    ResourceMark rm(THREAD);
    stringStream ss;
    ss.print("%s: method '", resolved_klass->external_name());
    resolved_method->signature()->print_as_signature_external_return_type(&ss);
    ss.print(" %s(", resolved_method->name()->as_C_string());
    resolved_method->signature()->print_as_signature_external_parameters(&ss);
    ss.print(")' not found");
    Exceptions::fthrow(
      THREAD_AND_LOCATION,
      vmSymbols::java_lang_NoSuchMethodError(),
      "%s", ss.as_string());
    return NULL;
  }

  // ensure that invokespecial's interface method reference is in
  // a direct superinterface, not an indirect superinterface
  Klass* current_klass = link_info.current_klass();
  if (current_klass != NULL && resolved_klass->is_interface()) {
    InstanceKlass* ck = InstanceKlass::cast(current_klass);
    InstanceKlass *klass_to_check = !ck->is_anonymous() ?
                                    ck :
                                    InstanceKlass::cast(ck->host_klass());
    // Disable verification for the dynamically-generated reflection bytecodes.
    bool is_reflect = klass_to_check->is_subclass_of(
                        SystemDictionary::reflect_MagicAccessorImpl_klass());

    if (!is_reflect &&
        !klass_to_check->is_same_or_direct_interface(resolved_klass)) {
      ResourceMark rm(THREAD);
      stringStream ss;
      ss.print("Interface method reference: '");
      resolved_method->print_external_name(&ss);
      ss.print("', is in an indirect superinterface of %s",
               current_klass->external_name());
      THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
    }
  }

  // check if not static
  if (resolved_method->is_static()) {
    ResourceMark rm(THREAD);
    stringStream ss;
    ss.print("Expecting non-static method '");
    resolved_method->print_external_name(&ss);
    ss.print("'");
    THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
  }

  if (log_develop_is_enabled(Trace, itables)) {
    trace_method_resolution("invokespecial resolved method: caller-class:",
                            current_klass, resolved_klass, resolved_method, true);
  }

  return resolved_method;
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::check_field_accessability(Klass* ref_klass,
                                             Klass* resolved_klass,
                                             Klass* sel_klass,
                                             const fieldDescriptor& fd,
                                             TRAPS) {
  bool can_access = Reflection::verify_member_access(ref_klass,
                                                     resolved_klass,
                                                     sel_klass,
                                                     fd.access_flags(),
                                                     true, false, CHECK);
  // Any existing exceptions that may have been thrown, for example LinkageErrors
  // from nest-host resolution, have been allowed to propagate.
  if (!can_access) {
    bool same_module = (sel_klass->module() == ref_klass->module());
    ResourceMark rm(THREAD);
    Exceptions::fthrow(
      THREAD_AND_LOCATION,
      vmSymbols::java_lang_IllegalAccessError(),
      "class %s tried to access %s%sfield %s.%s (%s%s%s)",
      ref_klass->external_name(),
      fd.is_protected() ? "protected " : "",
      fd.is_private()   ? "private "   : "",
      sel_klass->external_name(),
      fd.name()->as_C_string(),
      (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
      (same_module) ? "" : "; ",
      (same_module) ? "" : sel_klass->class_in_module_of_loader()
    );
    return;
  }
}

Project: jdk11u
File: linkResolver.cpp

methodHandle LinkResolver::lookup_instance_method_in_klasses(Klass* klass,
                                                             Symbol* name,
                                                             Symbol* signature,
                                                             Klass::PrivateLookupMode private_mode, TRAPS) {
  Method* result = klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);

  while (result != NULL && result->is_static() && result->method_holder()->super() != NULL) {
    Klass* super_klass = result->method_holder()->super();
    result = super_klass->uncached_lookup_method(name, signature, Klass::find_overpass, private_mode);
  }

  if (klass->is_array_klass()) {
    // Only consider klass and super klass for arrays
    return methodHandle(THREAD, result);
  }

  if (result == NULL) {
    Array<Method*>* default_methods = InstanceKlass::cast(klass)->default_methods();
    if (default_methods != NULL) {
      result = InstanceKlass::find_method(default_methods, name, signature);
      assert(result == NULL || !result->is_static(), "static defaults not allowed");
    }
  }
  return methodHandle(THREAD, result);
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_field(fieldDescriptor& fd,
                                 const LinkInfo& link_info,
                                 Bytecodes::Code byte, bool initialize_class,
                                 TRAPS) {
  assert(byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic ||
         byte == Bytecodes::_getfield  || byte == Bytecodes::_putfield  ||
         byte == Bytecodes::_nofast_getfield  || byte == Bytecodes::_nofast_putfield  ||
         (byte == Bytecodes::_nop && !link_info.check_access()), "bad field access bytecode");

  bool is_static = (byte == Bytecodes::_getstatic || byte == Bytecodes::_putstatic);
  bool is_put    = (byte == Bytecodes::_putfield  || byte == Bytecodes::_putstatic || byte == Bytecodes::_nofast_putfield);
  // Check if there's a resolved klass containing the field
  Klass* resolved_klass = link_info.resolved_klass();
  Symbol* field = link_info.name();
  Symbol* sig = link_info.signature();

  if (resolved_klass == NULL) {
    ResourceMark rm(THREAD);
    THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
  }

  // Resolve instance field
  Klass* sel_klass = resolved_klass->find_field(field, sig, &fd);
  // check if field exists; i.e., if a klass containing the field def has been selected
  if (sel_klass == NULL) {
    ResourceMark rm(THREAD);
    THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), field->as_C_string());
  }

  // Access checking may be turned off when calling from within the VM.
  Klass* current_klass = link_info.current_klass();
  if (link_info.check_access()) {

    // check access
    check_field_accessability(current_klass, resolved_klass, sel_klass, fd, CHECK);

    // check for errors
    if (is_static != fd.is_static()) {
      ResourceMark rm(THREAD);
      char msg[200];
      jio_snprintf(msg, sizeof(msg), "Expected %s field %s.%s", is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string());
      THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), msg);
    }

    // A final field can be modified only
    // (1) by methods declared in the class declaring the field and
    // (2) by the <clinit> method (in case of a static field)
    //     or by the <init> method (in case of an instance field).
    if (is_put && fd.access_flags().is_final()) {
      ResourceMark rm(THREAD);
      stringStream ss;

      if (sel_klass != current_klass) {
        ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
                 is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
                current_klass->external_name());
        THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
      }

      if (fd.constants()->pool_holder()->major_version() >= 53) {
        methodHandle m = link_info.current_method();
        assert(!m.is_null(), "information about the current method must be available for 'put' bytecodes");
        bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
                                                   fd.is_static() &&
                                                   !m()->is_static_initializer());
        bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
                                                     !fd.is_static() &&
                                                     !m->is_object_initializer());

        if (is_initialized_static_final_update || is_initialized_instance_final_update) {
          ss.print("Update to %s final field %s.%s attempted from a different method (%s) than the initializer method %s ",
                   is_static ? "static" : "non-static", resolved_klass->external_name(), fd.name()->as_C_string(),
                   m()->name()->as_C_string(),
                   is_static ? "<clinit>" : "<init>");
          THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
        }
      }
    }

    // initialize resolved_klass if necessary
    // note 1: the klass which declared the field must be initialized (i.e, sel_klass)
    //         according to the newest JVM spec (5.5, p.170) - was bug (gri 7/28/99)
    //
    // note 2: we don't want to force initialization if we are just checking
    //         if the field access is legal; e.g., during compilation
    if (is_static && initialize_class) {
      sel_klass->initialize(CHECK);
    }
  }

  if ((sel_klass != current_klass) && (current_klass != NULL)) {
    check_field_loader_constraints(field, sig, current_klass, sel_klass, CHECK);
  }

  // return information. note that the klass is set to the actual klass containing the
  // field, otherwise access of static fields in superclasses will not work.
}

Project: jdk11u
File: linkResolver.cpp

LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, TRAPS) {
   // resolve klass
  _resolved_klass = pool->klass_ref_at(index, CHECK);

  // Get name, signature, and static klass
  _name          = pool->name_ref_at(index);
  _signature     = pool->signature_ref_at(index);
  _tag           = pool->tag_ref_at(index);
  _current_klass = pool->pool_holder();
  _current_method = methodHandle();

  // Coming from the constant pool always checks access
  _check_access  = true;
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_invoke(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, Bytecodes::Code byte, TRAPS) {
  switch (byte) {
    case Bytecodes::_invokestatic   : resolve_invokestatic   (result,       pool, index, CHECK); break;
    case Bytecodes::_invokespecial  : resolve_invokespecial  (result, recv, pool, index, CHECK); break;
    case Bytecodes::_invokevirtual  : resolve_invokevirtual  (result, recv, pool, index, CHECK); break;
    case Bytecodes::_invokehandle   : resolve_invokehandle   (result,       pool, index, CHECK); break;
    case Bytecodes::_invokedynamic  : resolve_invokedynamic  (result,       pool, index, CHECK); break;
    case Bytecodes::_invokeinterface: resolve_invokeinterface(result, recv, pool, index, CHECK); break;
    default                         :                                                            break;
  }
  return;
}

Project: jdk11u
File: linkResolver.cpp

LinkInfo::LinkInfo(const constantPoolHandle& pool, int index, const methodHandle& current_method, TRAPS) {
   // resolve klass
  _resolved_klass = pool->klass_ref_at(index, CHECK);

  // Get name, signature, and static klass
  _name          = pool->name_ref_at(index);
  _signature     = pool->signature_ref_at(index);
  _tag           = pool->tag_ref_at(index);
  _current_klass = pool->pool_holder();
  _current_method = current_method;

  // Coming from the constant pool always checks access
  _check_access  = true;
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::check_klass_accessability(Klass* ref_klass, Klass* sel_klass,
                                             bool fold_type_to_class, TRAPS) {
  Klass* base_klass = sel_klass;
  if (fold_type_to_class) {
    if (sel_klass->is_objArray_klass()) {
      base_klass = ObjArrayKlass::cast(sel_klass)->bottom_klass();
    }
    // The element type could be a typeArray - we only need the access
    // check if it is a reference to another class.
    if (!base_klass->is_instance_klass()) {
      return;  // no relevant check to do
    }
  }
  Reflection::VerifyClassAccessResults vca_result =
    Reflection::verify_class_access(ref_klass, InstanceKlass::cast(base_klass), true);
  if (vca_result != Reflection::ACCESS_OK) {
    ResourceMark rm(THREAD);
    char* msg = Reflection::verify_class_access_msg(ref_klass,
                                                    InstanceKlass::cast(base_klass),
                                                    vca_result);
    bool same_module = (base_klass->module() == ref_klass->module());
    if (msg == NULL) {
      Exceptions::fthrow(
        THREAD_AND_LOCATION,
        vmSymbols::java_lang_IllegalAccessError(),
        "failed to access class %s from class %s (%s%s%s)",
        base_klass->external_name(),
        ref_klass->external_name(),
        (same_module) ? base_klass->joint_in_module_of_loader(ref_klass) : base_klass->class_in_module_of_loader(),
        (same_module) ? "" : "; ",
        (same_module) ? "" : ref_klass->class_in_module_of_loader());
    } else {
      // Use module specific message returned by verify_class_access_msg().
      Exceptions::fthrow(
        THREAD_AND_LOCATION,
        vmSymbols::java_lang_IllegalAccessError(),
        "%s", msg);
    }
  }
}

Project: jdk11u
File: linkResolver.cpp

methodHandle LinkResolver::resolve_interface_call_or_null(
                                                 Klass* receiver_klass,
                                                 const LinkInfo& link_info) {
  EXCEPTION_MARK;
  CallInfo info;
  resolve_interface_call(info, Handle(), receiver_klass, link_info, false, THREAD);
  if (HAS_PENDING_EXCEPTION) {
    CLEAR_PENDING_EXCEPTION;
    return methodHandle();
  }
  return info.selected_method();
}

Project: jdk11u
File: linkResolver.cpp

methodHandle LinkResolver::resolve_special_call_or_null(const LinkInfo& link_info) {
  EXCEPTION_MARK;
  CallInfo info;
  resolve_special_call(info, Handle(), link_info, THREAD);
  if (HAS_PENDING_EXCEPTION) {
    CLEAR_PENDING_EXCEPTION;
    return methodHandle();
  }
  return info.selected_method();
}

Project: jdk11u
File: linkResolver.cpp

methodHandle LinkResolver::resolve_method_statically(Bytecodes::Code code,
                                                     const constantPoolHandle& pool, int index, TRAPS) {
  // This method is used only
  // (1) in C2 from InlineTree::ok_to_inline (via ciMethod::check_call),
  // and
  // (2) in Bytecode_invoke::static_target
  // It appears to fail when applied to an invokeinterface call site.
  // FIXME: Remove this method and ciMethod::check_call; refactor to use the other LinkResolver entry points.
  // resolve klass
  if (code == Bytecodes::_invokedynamic) {
    Klass* resolved_klass = SystemDictionary::MethodHandle_klass();
    Symbol* method_name = vmSymbols::invoke_name();
    Symbol* method_signature = pool->signature_ref_at(index);
    Klass*  current_klass = pool->pool_holder();
    LinkInfo link_info(resolved_klass, method_name, method_signature, current_klass);
    return resolve_method(link_info, code, THREAD);
  }

  LinkInfo link_info(pool, index, methodHandle(), CHECK_NULL);
  Klass* resolved_klass = link_info.resolved_klass();

  if (pool->has_preresolution()
      || (resolved_klass == SystemDictionary::MethodHandle_klass() &&
          MethodHandles::is_signature_polymorphic_name(resolved_klass, link_info.name()))) {
    Method* result = ConstantPool::method_at_if_loaded(pool, index);
    if (result != NULL) {
      return methodHandle(THREAD, result);
    }
  }

  if (code == Bytecodes::_invokeinterface) {
    return resolve_interface_method(link_info, code, THREAD);
  } else if (code == Bytecodes::_invokevirtual) {
    return resolve_method(link_info, code, THREAD);
  } else if (!resolved_klass->is_interface()) {
    return resolve_method(link_info, code, THREAD);
  } else {
    return resolve_interface_method(link_info, code, THREAD);
  }
}

Project: jdk11u
File: linkResolver.cpp

void CallInfo::set_common(Klass* resolved_klass,
                          Klass* selected_klass,
                          const methodHandle& resolved_method,
                          const methodHandle& selected_method,
                          CallKind kind,
                          int index,
                          TRAPS) {
  assert(resolved_method->signature() == selected_method->signature(), "signatures must correspond");
  _resolved_klass  = resolved_klass;
  _selected_klass  = selected_klass;
  _resolved_method = resolved_method;
  _selected_method = selected_method;
  _call_kind       = kind;
  _call_index      = index;
  _resolved_appendix = Handle();
  DEBUG_ONLY(verify());  // verify before making side effects

  CompilationPolicy::compile_if_required(selected_method, THREAD);
}

Project: jdk11u
File: linkResolver.cpp

methodHandle LinkResolver::linktime_resolve_static_method(const LinkInfo& link_info, TRAPS) {

  Klass* resolved_klass = link_info.resolved_klass();
  methodHandle resolved_method;
  if (!resolved_klass->is_interface()) {
    resolved_method = resolve_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
  } else {
    resolved_method = resolve_interface_method(link_info, Bytecodes::_invokestatic, CHECK_NULL);
  }
  assert(resolved_method->name() != vmSymbols::class_initializer_name(), "should have been checked in verifier");

  // check if static
  if (!resolved_method->is_static()) {
    ResourceMark rm(THREAD);
    stringStream ss;
    ss.print("Expected static method '");
    resolved_method()->print_external_name(&ss);
    ss.print("'");
    THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
  }
  return resolved_method;
}

Project: jdk11u
File: linkResolver.cpp

int LinkResolver::vtable_index_of_interface_method(Klass* klass,
                                                   const methodHandle& resolved_method) {

  int vtable_index = Method::invalid_vtable_index;
  Symbol* name = resolved_method->name();
  Symbol* signature = resolved_method->signature();
  InstanceKlass* ik = InstanceKlass::cast(klass);

  // First check in default method array
  if (!resolved_method->is_abstract() && ik->default_methods() != NULL) {
    int index = InstanceKlass::find_method_index(ik->default_methods(),
                                                 name, signature, Klass::find_overpass,
                                                 Klass::find_static, Klass::find_private);
    if (index >= 0 ) {
      vtable_index = ik->default_vtable_indices()->at(index);
    }
  }
  if (vtable_index == Method::invalid_vtable_index) {
    // get vtable_index for miranda methods
    klassVtable vt = ik->vtable();
    vtable_index = vt.index_of_miranda(name, signature);
  }
  return vtable_index;
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_field_access(fieldDescriptor& fd, const constantPoolHandle& pool, int index, const methodHandle& method, Bytecodes::Code byte, TRAPS) {
  LinkInfo link_info(pool, index, method, CHECK);
  resolve_field(fd, link_info, byte, true, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_dynamic_call(CallInfo& result,
                                        int pool_index,
                                        Handle bootstrap_specifier,
                                        Symbol* method_name, Symbol* method_signature,
                                        Klass* current_klass,
                                        TRAPS) {
  // JSR 292:  this must resolve to an implicitly generated method MH.linkToCallSite(*...)
  // The appendix argument is likely to be a freshly-created CallSite.
  Handle       resolved_appendix;
  Handle       resolved_method_type;
  methodHandle resolved_method =
    SystemDictionary::find_dynamic_call_site_invoker(current_klass,
                                                     pool_index,
                                                     bootstrap_specifier,
                                                     method_name, method_signature,
                                                     &resolved_appendix,
                                                     &resolved_method_type,
                                                     THREAD);
  Exceptions::wrap_dynamic_exception(CHECK);
  result.set_handle(resolved_method, resolved_appendix, resolved_method_type, THREAD);
  Exceptions::wrap_dynamic_exception(CHECK);
}

Project: jdk11u
File: linkResolver.cpp

methodHandle LinkResolver::linktime_resolve_interface_method(const LinkInfo& link_info,
                                                             TRAPS) {
  // normal interface method resolution
  methodHandle resolved_method = resolve_interface_method(link_info, Bytecodes::_invokeinterface, CHECK_NULL);
  assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
  assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");

  return resolved_method;
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::runtime_resolve_special_method(CallInfo& result,
                                                  const LinkInfo& link_info,
                                                  const methodHandle& resolved_method,
                                                  Handle recv, TRAPS) {

  Klass* resolved_klass = link_info.resolved_klass();

  // resolved method is selected method unless we have an old-style lookup
  // for a superclass method
  // Invokespecial for a superinterface, resolved method is selected method,
  // no checks for shadowing
  methodHandle sel_method(THREAD, resolved_method());

  if (link_info.check_access() &&
      // check if the method is not <init>
      resolved_method->name() != vmSymbols::object_initializer_name()) {

     // check if this is an old-style super call and do a new lookup if so
     // a) check if ACC_SUPER flag is set for the current class
    Klass* current_klass = link_info.current_klass();
    if ((current_klass->is_super() || !AllowNonVirtualCalls) &&
        // b) check if the class of the resolved_klass is a superclass
        // (not supertype in order to exclude interface classes) of the current class.
        // This check is not performed for super.invoke for interface methods
        // in super interfaces.
        current_klass->is_subclass_of(resolved_klass) &&
        current_klass != resolved_klass
        ) {
      // Lookup super method
      Klass* super_klass = current_klass->super();
      sel_method = lookup_instance_method_in_klasses(super_klass,
                                                     resolved_method->name(),
                                                     resolved_method->signature(),
                                                     Klass::find_private, CHECK);
      // check if found
      if (sel_method.is_null()) {
        ResourceMark rm(THREAD);
        stringStream ss;
        ss.print("'");
        resolved_method->print_external_name(&ss);
        ss.print("'");
        THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
      // check loader constraints if found a different method
      } else if (sel_method() != resolved_method()) {
        check_method_loader_constraints(link_info, sel_method, "method", CHECK);
      }
    }

    // Check that the class of objectref (the receiver) is the current class or interface,
    // or a subtype of the current class or interface (the sender), otherwise invokespecial
    // throws IllegalAccessError.
    // The verifier checks that the sender is a subtype of the class in the I/MR operand.
    // The verifier also checks that the receiver is a subtype of the sender, if the sender is
    // a class.  If the sender is an interface, the check has to be performed at runtime.
    InstanceKlass* sender = InstanceKlass::cast(current_klass);
    sender = sender->is_anonymous() ? sender->host_klass() : sender;
    if (sender->is_interface() && recv.not_null()) {
      Klass* receiver_klass = recv->klass();
      if (!receiver_klass->is_subtype_of(sender)) {
        ResourceMark rm(THREAD);
        char buf[500];
        jio_snprintf(buf, sizeof(buf),
                     "Receiver class %s must be the current class or a subtype of interface %s",
                     receiver_klass->external_name(),
                     sender->external_name());
        THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), buf);
      }
    }
  }

  // check if not static
  if (sel_method->is_static()) {
    ResourceMark rm(THREAD);
    stringStream ss;
    ss.print("Expecting non-static method '");
    resolved_method->print_external_name(&ss);
    ss.print("'");
    THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
  }

  // check if abstract
  if (sel_method->is_abstract()) {
    ResourceMark rm(THREAD);
    stringStream ss;
    ss.print("'");
    Method::print_external_name(&ss, resolved_klass, sel_method->name(), sel_method->signature());
    ss.print("'");
    THROW_MSG(vmSymbols::java_lang_AbstractMethodError(), ss.as_string());
  }

  if (log_develop_is_enabled(Trace, itables)) {
    trace_method_resolution("invokespecial selected method: resolved-class:",
                            resolved_klass, resolved_klass, sel_method, true);
  }

  // setup result
  result.set_static(resolved_klass, sel_method, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::runtime_resolve_interface_method(CallInfo& result,
                                                    const methodHandle& resolved_method,
                                                    Klass* resolved_klass,
                                                    Handle recv,
                                                    Klass* recv_klass,
                                                    bool check_null_and_abstract, TRAPS) {

  // check if receiver exists
  if (check_null_and_abstract && recv.is_null()) {
    THROW(vmSymbols::java_lang_NullPointerException());
  }

  // check if receiver klass implements the resolved interface
  if (!recv_klass->is_subtype_of(resolved_klass)) {
    ResourceMark rm(THREAD);
    char buf[200];
    jio_snprintf(buf, sizeof(buf), "Class %s does not implement the requested interface %s",
                 recv_klass->external_name(),
                 resolved_klass->external_name());
    THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf);
  }

  methodHandle selected_method = resolved_method;

  // resolve the method in the receiver class, unless it is private
  if (!resolved_method()->is_private()) {
    // do lookup based on receiver klass
    // This search must match the linktime preparation search for itable initialization
    // to correctly enforce loader constraints for interface method inheritance.
    // Private methods are skipped as the resolved method was not private.
    selected_method = lookup_instance_method_in_klasses(recv_klass,
                                                        resolved_method->name(),
                                                        resolved_method->signature(),
                                                        Klass::skip_private, CHECK);

    if (selected_method.is_null() && !check_null_and_abstract) {
      // In theory this is a harmless placeholder value, but
      // in practice leaving in null affects the nsk default method tests.
      // This needs further study.
      selected_method = resolved_method;
    }
    // check if method exists
    if (selected_method.is_null()) {
      // Pass arguments for generating a verbose error message.
      throw_abstract_method_error(resolved_method, recv_klass, CHECK);
    }
    // check access
    // Throw Illegal Access Error if selected_method is not public.
    if (!selected_method->is_public()) {
      ResourceMark rm(THREAD);
      stringStream ss;
      ss.print("'");
      Method::print_external_name(&ss, recv_klass, selected_method->name(), selected_method->signature());
      ss.print("'");
      THROW_MSG(vmSymbols::java_lang_IllegalAccessError(), ss.as_string());
    }
    // check if abstract
    if (check_null_and_abstract && selected_method->is_abstract()) {
      throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
    }
  }

  if (log_develop_is_enabled(Trace, itables)) {
    trace_method_resolution("invokeinterface selected method: receiver-class:",
                            recv_klass, resolved_klass, selected_method, true);
  }
  // setup result
  if (resolved_method->has_vtable_index()) {
    int vtable_index = resolved_method->vtable_index();
    log_develop_trace(itables)("  -- vtable index: %d", vtable_index);
    assert(vtable_index == selected_method->vtable_index(), "sanity check");
    result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
  } else if (resolved_method->has_itable_index()) {
    int itable_index = resolved_method()->itable_index();
    log_develop_trace(itables)("  -- itable index: %d", itable_index);
    result.set_interface(resolved_klass, recv_klass, resolved_method, selected_method, itable_index, CHECK);
  } else {
    int index = resolved_method->vtable_index();
    log_develop_trace(itables)("  -- non itable/vtable index: %d", index);
    assert(index == Method::nonvirtual_vtable_index, "Oops hit another case!");
    assert(resolved_method()->is_private() ||
           (resolved_method()->is_final() && resolved_method->method_holder() == SystemDictionary::Object_klass()),
           "Should only have non-virtual invokeinterface for private or final-Object methods!");
    assert(resolved_method()->can_be_statically_bound(), "Should only have non-virtual invokeinterface for statically bound methods!");
    // This sets up the nonvirtual form of "virtual" call (as needed for final and private methods)
    result.set_virtual(resolved_klass, resolved_klass, resolved_method, resolved_method, index, CHECK);
  }
}

Project: jdk11u
File: linkResolver.cpp

void CallInfo::print() {
  ResourceMark rm;
  const char* kindstr;
  switch (_call_kind) {
  case direct_call: kindstr = "direct";  break;
  case vtable_call: kindstr = "vtable";  break;
  case itable_call: kindstr = "itable";  break;
  default         : kindstr = "unknown"; break;
  }
  tty->print_cr("Call %s@%d %s", kindstr, _call_index,
                _resolved_method.is_null() ? "(none)" : _resolved_method->name_and_sig_as_C_string());
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_invokevirtual(CallInfo& result, Handle recv,
                                          const constantPoolHandle& pool, int index,
                                          TRAPS) {

  LinkInfo link_info(pool, index, CHECK);
  Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
  resolve_virtual_call(result, recv, recvrKlass, link_info, /*check_null_or_abstract*/true, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::runtime_resolve_virtual_method(CallInfo& result,
                                                  const methodHandle& resolved_method,
                                                  Klass* resolved_klass,
                                                  Handle recv,
                                                  Klass* recv_klass,
                                                  bool check_null_and_abstract,
                                                  TRAPS) {

  // setup default return values
  int vtable_index = Method::invalid_vtable_index;
  methodHandle selected_method;

  // runtime method resolution
  if (check_null_and_abstract && recv.is_null()) { // check if receiver exists
    THROW(vmSymbols::java_lang_NullPointerException());
  }

  // Virtual methods cannot be resolved before its klass has been linked, for otherwise the Method*'s
  // has not been rewritten, and the vtable initialized. Make sure to do this after the nullcheck, since
  // a missing receiver might result in a bogus lookup.
  assert(resolved_method->method_holder()->is_linked(), "must be linked");

  // do lookup based on receiver klass using the vtable index
  if (resolved_method->method_holder()->is_interface()) { // default or miranda method
    vtable_index = vtable_index_of_interface_method(resolved_klass, resolved_method);
    assert(vtable_index >= 0 , "we should have valid vtable index at this point");

    selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
  } else {
    // at this point we are sure that resolved_method is virtual and not
    // a default or miranda method; therefore, it must have a valid vtable index.
    assert(!resolved_method->has_itable_index(), "");
    vtable_index = resolved_method->vtable_index();
    // We could get a negative vtable_index of nonvirtual_vtable_index for private
    // methods, or for final methods. Private methods never appear in the vtable
    // and never override other methods. As an optimization, final methods are
    // never put in the vtable, unless they override an existing method.
    // So if we do get nonvirtual_vtable_index, it means the selected method is the
    // resolved method, and it can never be changed by an override.
    if (vtable_index == Method::nonvirtual_vtable_index) {
      assert(resolved_method->can_be_statically_bound(), "cannot override this method");
      selected_method = resolved_method;
    } else {
      selected_method = methodHandle(THREAD, recv_klass->method_at_vtable(vtable_index));
    }
  }

  // check if method exists
  if (selected_method.is_null()) {
    throw_abstract_method_error(resolved_method, recv_klass, CHECK);
  }

  // check if abstract
  if (check_null_and_abstract && selected_method->is_abstract()) {
    // Pass arguments for generating a verbose error message.
    throw_abstract_method_error(resolved_method, selected_method, recv_klass, CHECK);
  }

  if (log_develop_is_enabled(Trace, vtables)) {
    trace_method_resolution("invokevirtual selected method: receiver-class:",
                            recv_klass, resolved_klass, selected_method,
                            false, vtable_index);
  }
  // setup result
  result.set_virtual(resolved_klass, recv_klass, resolved_method, selected_method, vtable_index, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

methodHandle LinkResolver::lookup_polymorphic_method(
                                             const LinkInfo& link_info,
                                             Handle *appendix_result_or_null,
                                             Handle *method_type_result,
                                             TRAPS) {
  Klass* klass = link_info.resolved_klass();
  Symbol* name = link_info.name();
  Symbol* full_signature = link_info.signature();

  vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
  if (TraceMethodHandles) {
    ResourceMark rm(THREAD);
    tty->print_cr("lookup_polymorphic_method iid=%s %s.%s%s",
                  vmIntrinsics::name_at(iid), klass->external_name(),
                  name->as_C_string(), full_signature->as_C_string());
  }
  if ((klass == SystemDictionary::MethodHandle_klass() ||
       klass == SystemDictionary::VarHandle_klass()) &&
      iid != vmIntrinsics::_none) {
    if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
      // Most of these do not need an up-call to Java to resolve, so can be done anywhere.
      // Do not erase last argument type (MemberName) if it is a static linkTo method.
      bool keep_last_arg = MethodHandles::is_signature_polymorphic_static(iid);
      TempNewSymbol basic_signature =
        MethodHandles::lookup_basic_type_signature(full_signature, keep_last_arg, CHECK_NULL);
      if (TraceMethodHandles) {
        ResourceMark rm(THREAD);
        tty->print_cr("lookup_polymorphic_method %s %s => basic %s",
                      name->as_C_string(),
                      full_signature->as_C_string(),
                      basic_signature->as_C_string());
      }
      methodHandle result = SystemDictionary::find_method_handle_intrinsic(iid,
                                                              basic_signature,
                                                              CHECK_NULL);
      if (result.not_null()) {
        assert(result->is_method_handle_intrinsic(), "MH.invokeBasic or MH.linkTo* intrinsic");
        assert(result->intrinsic_id() != vmIntrinsics::_invokeGeneric, "wrong place to find this");
        assert(basic_signature == result->signature(), "predict the result signature");
        if (TraceMethodHandles) {
          ttyLocker ttyl;
          tty->print("lookup_polymorphic_method => intrinsic ");
          result->print_on(tty);
        }
      }
      return result;
    } else if (iid == vmIntrinsics::_invokeGeneric
               && THREAD->can_call_java()
               && appendix_result_or_null != NULL) {
      // This is a method with type-checking semantics.
      // We will ask Java code to spin an adapter method for it.
      if (!MethodHandles::enabled()) {
        // Make sure the Java part of the runtime has been booted up.
        Klass* natives = SystemDictionary::MethodHandleNatives_klass();
        if (natives == NULL || InstanceKlass::cast(natives)->is_not_initialized()) {
          SystemDictionary::resolve_or_fail(vmSymbols::java_lang_invoke_MethodHandleNatives(),
                                            Handle(),
                                            Handle(),
                                            true,
                                            CHECK_NULL);
        }
      }

      Handle appendix;
      Handle method_type;
      methodHandle result = SystemDictionary::find_method_handle_invoker(
                                                            klass,
                                                            name,
                                                            full_signature,
                                                            link_info.current_klass(),
                                                            &appendix,
                                                            &method_type,
                                                            CHECK_NULL);
      if (TraceMethodHandles) {
        ttyLocker ttyl;
        tty->print("lookup_polymorphic_method => (via Java) ");
        result->print_on(tty);
        tty->print("  lookup_polymorphic_method => appendix = ");
        if (appendix.is_null())  tty->print_cr("(none)");
        else                     appendix->print_on(tty);
      }
      if (result.not_null()) {
#ifdef ASSERT
        ResourceMark rm(THREAD);

        TempNewSymbol basic_signature =
          MethodHandles::lookup_basic_type_signature(full_signature, CHECK_NULL);
        int actual_size_of_params = result->size_of_parameters();
        int expected_size_of_params = ArgumentSizeComputer(basic_signature).size();
        // +1 for MethodHandle.this, +1 for trailing MethodType
        if (!MethodHandles::is_signature_polymorphic_static(iid))  expected_size_of_params += 1;
        if (appendix.not_null())                                   expected_size_of_params += 1;
        if (actual_size_of_params != expected_size_of_params) {
          tty->print_cr("*** basic_signature=%s", basic_signature->as_C_string());
          tty->print_cr("*** result for %s: ", vmIntrinsics::name_at(iid));
          result->print();
        }
        assert(actual_size_of_params == expected_size_of_params,
               "%d != %d", actual_size_of_params, expected_size_of_params);
#endif //ASSERT

        assert(appendix_result_or_null != NULL, "");
        (*appendix_result_or_null) = appendix;
        (*method_type_result)      = method_type;
      }
      return result;
    }
  }
  return NULL;
}

Project: jdk11u
File: linkResolver.cpp

void CallInfo::set_handle(Klass* resolved_klass,
                          const methodHandle& resolved_method,
                          Handle resolved_appendix,
                          Handle resolved_method_type, TRAPS) {
  if (resolved_method.is_null()) {
    THROW_MSG(vmSymbols::java_lang_InternalError(), "resolved method is null");
  }
  assert(resolved_method->intrinsic_id() == vmIntrinsics::_invokeBasic ||
         resolved_method->is_compiled_lambda_form(),
         "linkMethod must return one of these");
  int vtable_index = Method::nonvirtual_vtable_index;
  assert(!resolved_method->has_vtable_index(), "");
  set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
  _resolved_appendix    = resolved_appendix;
  _resolved_method_type = resolved_method_type;
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::check_method_accessability(Klass* ref_klass,
                                              Klass* resolved_klass,
                                              Klass* sel_klass,
                                              const methodHandle& sel_method,
                                              TRAPS) {

  AccessFlags flags = sel_method->access_flags();

  // Special case:  arrays always override "clone". JVMS 2.15.
  // If the resolved klass is an array class, and the declaring class
  // is java.lang.Object and the method is "clone", set the flags
  // to public.
  //
  // We'll check for the method name first, as that's most likely
  // to be false (so we'll short-circuit out of these tests).
  if (sel_method->name() == vmSymbols::clone_name() &&
      sel_klass == SystemDictionary::Object_klass() &&
      resolved_klass->is_array_klass()) {
    // We need to change "protected" to "public".
    assert(flags.is_protected(), "clone not protected?");
    jint new_flags = flags.as_int();
    new_flags = new_flags & (~JVM_ACC_PROTECTED);
    new_flags = new_flags | JVM_ACC_PUBLIC;
    flags.set_flags(new_flags);
  }
//  assert(extra_arg_result_or_null != NULL, "must be able to return extra argument");

  bool can_access = Reflection::verify_member_access(ref_klass,
                                                     resolved_klass,
                                                     sel_klass,
                                                     flags,
                                                     true, false, CHECK);
  // Any existing exceptions that may have been thrown, for example LinkageErrors
  // from nest-host resolution, have been allowed to propagate.
  if (!can_access) {
    ResourceMark rm(THREAD);
    bool same_module = (sel_klass->module() == ref_klass->module());
    Exceptions::fthrow(
      THREAD_AND_LOCATION,
      vmSymbols::java_lang_IllegalAccessError(),
      "class %s tried to access %s%s%smethod '%s' (%s%s%s)",
      ref_klass->external_name(),
      sel_method->is_abstract()  ? "abstract "  : "",
      sel_method->is_protected() ? "protected " : "",
      sel_method->is_private()   ? "private "   : "",
      sel_method->external_name(),
      (same_module) ? ref_klass->joint_in_module_of_loader(sel_klass) : ref_klass->class_in_module_of_loader(),
      (same_module) ? "" : "; ",
      (same_module) ? "" : sel_klass->class_in_module_of_loader()
    );
    return;
  }
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::check_field_loader_constraints(Symbol* field, Symbol* sig,
                                                  Klass* current_klass,
                                                  Klass* sel_klass, TRAPS) {
  Handle ref_loader(THREAD, current_klass->class_loader());
  Handle sel_loader(THREAD, sel_klass->class_loader());

  ResourceMark rm(THREAD);  // needed for check_signature_loaders
  Symbol* failed_type_symbol =
    SystemDictionary::check_signature_loaders(sig,
                                              ref_loader, sel_loader,
                                              false,
                                              CHECK);
  if (failed_type_symbol != NULL) {
    stringStream ss;
    const char* failed_type_name = failed_type_symbol->as_klass_external_name();

    ss.print("loader constraint violation: when resolving field"
             " \"%s\" of type %s, the class loader %s of the current class, "
             "%s, and the class loader %s for the field's defining "
             "type, %s, have different Class objects for type %s (%s; %s)",
             field->as_C_string(),
             failed_type_name,
             current_klass->class_loader_data()->loader_name_and_id(),
             current_klass->external_name(),
             sel_klass->class_loader_data()->loader_name_and_id(),
             sel_klass->external_name(),
             failed_type_name,
             current_klass->class_in_module_of_loader(false, true),
             sel_klass->class_in_module_of_loader(false, true));
    THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
  }
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_static_call(CallInfo& result,
                                       const LinkInfo& link_info,
                                       bool initialize_class, TRAPS) {
  methodHandle resolved_method = linktime_resolve_static_method(link_info, CHECK);

  // The resolved class can change as a result of this resolution.
  Klass* resolved_klass = resolved_method->method_holder();

  // Initialize klass (this should only happen if everything is ok)
  if (initialize_class && resolved_klass->should_be_initialized()) {
    resolved_klass->initialize(CHECK);
    // Use updated LinkInfo to reresolve with resolved method holder
    LinkInfo new_info(resolved_klass, link_info.name(), link_info.signature(),
                      link_info.current_klass(),
                      link_info.check_access() ? LinkInfo::needs_access_check : LinkInfo::skip_access_check);
    resolved_method = linktime_resolve_static_method(new_info, CHECK);
  }

  // setup result
  result.set_static(resolved_klass, resolved_method, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_virtual_call(CallInfo& result, Handle recv, Klass* receiver_klass,
                                        const LinkInfo& link_info,
                                        bool check_null_and_abstract, TRAPS) {
  methodHandle resolved_method = linktime_resolve_virtual_method(link_info, CHECK);
  runtime_resolve_virtual_method(result, resolved_method,
                                 link_info.resolved_klass(),
                                 recv, receiver_klass,
                                 check_null_and_abstract, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

void CallInfo::set_interface(Klass* resolved_klass,
                             Klass* selected_klass,
                             const methodHandle& resolved_method,
                             const methodHandle& selected_method,
                             int itable_index, TRAPS) {
  // This is only called for interface methods. If the resolved_method
  // comes from java/lang/Object, it can be the subject of a virtual call, so
  // we should pick the vtable index from the resolved method.
  // In that case, the caller must call set_virtual instead of set_interface.
  assert(resolved_method->method_holder()->is_interface(), "");
  assert(itable_index == resolved_method()->itable_index(), "");
  set_common(resolved_klass, selected_klass, resolved_method, selected_method, CallInfo::itable_call, itable_index, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

methodHandle LinkResolver::linktime_resolve_virtual_method(const LinkInfo& link_info,
                                                           TRAPS) {
  // normal method resolution
  methodHandle resolved_method = resolve_method(link_info, Bytecodes::_invokevirtual, CHECK_NULL);

  assert(resolved_method->name() != vmSymbols::object_initializer_name(), "should have been checked in verifier");
  assert(resolved_method->name() != vmSymbols::class_initializer_name (), "should have been checked in verifier");

  // check if private interface method
  Klass* resolved_klass = link_info.resolved_klass();
  Klass* current_klass = link_info.current_klass();

  // This is impossible, if resolve_klass is an interface, we've thrown icce in resolve_method
  if (resolved_klass->is_interface() && resolved_method->is_private()) {
    ResourceMark rm(THREAD);
    stringStream ss;
    ss.print("private interface method requires invokespecial, not invokevirtual: method '");
    resolved_method->print_external_name(&ss);
    ss.print("', caller-class: %s",
             (current_klass == NULL ? "<null>" : current_klass->internal_name()));
    THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
  }

  // check if not static
  if (resolved_method->is_static()) {
    ResourceMark rm(THREAD);
    stringStream ss;
    ss.print("Expecting non-static method '");
    resolved_method->print_external_name(&ss);
    ss.print("'");
    THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
  }

  if (log_develop_is_enabled(Trace, vtables)) {
    trace_method_resolution("invokevirtual resolved method: caller-class:",
                            current_klass, resolved_klass, resolved_method, false);
  }

  return resolved_method;
}

Project: jdk11u
File: linkResolver.cpp

void CallInfo::set_static(Klass* resolved_klass, const methodHandle& resolved_method, TRAPS) {
  int vtable_index = Method::nonvirtual_vtable_index;
  set_common(resolved_klass, resolved_klass, resolved_method, resolved_method, CallInfo::direct_call, vtable_index, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_invokeinterface(CallInfo& result, Handle recv, const constantPoolHandle& pool, int index, TRAPS) {
  LinkInfo link_info(pool, index, CHECK);
  Klass* recvrKlass = recv.is_null() ? (Klass*)NULL : recv->klass();
  resolve_interface_call(result, recv, recvrKlass, link_info, true, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

int LinkResolver::resolve_virtual_vtable_index(Klass* receiver_klass,
                                               const LinkInfo& link_info) {
  EXCEPTION_MARK;
  CallInfo info;
  resolve_virtual_call(info, Handle(), receiver_klass, link_info,
                       /*check_null_or_abstract*/false, THREAD);
  if (HAS_PENDING_EXCEPTION) {
    CLEAR_PENDING_EXCEPTION;
    return Method::invalid_vtable_index;
  }
  return info.vtable_index();
}

Project: jdk11u
File: linkResolver.cpp

methodHandle LinkResolver::linktime_resolve_virtual_method_or_null(
                                                 const LinkInfo& link_info) {
  EXCEPTION_MARK;
  methodHandle method_result = linktime_resolve_virtual_method(link_info, THREAD);
  if (HAS_PENDING_EXCEPTION) {
    CLEAR_PENDING_EXCEPTION;
    return methodHandle();
  } else {
    return method_result;
  }
}

Project: jdk11u
File: linkResolver.cpp

void CallInfo::set_resolved_method_name(TRAPS) {
  Method* m = _resolved_method();
  assert(m != NULL, "Should already have a Method*");
  oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
  _resolved_method_name = Handle(THREAD, rmethod_name);
}

Project: jdk11u
File: linkResolver.cpp

Method* LinkResolver::lookup_method_in_klasses(const LinkInfo& link_info,
                                               bool checkpolymorphism,
                                               bool in_imethod_resolve) {
  NoSafepointVerifier nsv;  // Method* returned may not be reclaimed

  Klass* klass = link_info.resolved_klass();
  Symbol* name = link_info.name();
  Symbol* signature = link_info.signature();

  // Ignore overpasses so statics can be found during resolution
  Method* result = klass->uncached_lookup_method(name, signature, Klass::skip_overpass);

  if (klass->is_array_klass()) {
    // Only consider klass and super klass for arrays
    return result;
  }

  InstanceKlass* ik = InstanceKlass::cast(klass);

  // JDK 8, JVMS 5.4.3.4: Interface method resolution should
  // ignore static and non-public methods of java.lang.Object,
  // like clone, finalize, registerNatives.
  if (in_imethod_resolve &&
      result != NULL &&
      ik->is_interface() &&
      (result->is_static() || !result->is_public()) &&
      result->method_holder() == SystemDictionary::Object_klass()) {
    result = NULL;
  }

  // Before considering default methods, check for an overpass in the
  // current class if a method has not been found.
  if (result == NULL) {
    result = ik->find_method(name, signature);
  }

  if (result == NULL) {
    Array<Method*>* default_methods = ik->default_methods();
    if (default_methods != NULL) {
      result = InstanceKlass::find_method(default_methods, name, signature);
    }
  }

  if (checkpolymorphism && result != NULL) {
    vmIntrinsics::ID iid = result->intrinsic_id();
    if (MethodHandles::is_signature_polymorphic(iid)) {
      // Do not link directly to these.  The VM must produce a synthetic one using lookup_polymorphic_method.
      return NULL;
    }
  }
  return result;
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::check_method_loader_constraints(const LinkInfo& link_info,
                                                   const methodHandle& resolved_method,
                                                   const char* method_type, TRAPS) {
  Handle current_loader(THREAD, link_info.current_klass()->class_loader());
  Handle resolved_loader(THREAD, resolved_method->method_holder()->class_loader());

  ResourceMark rm(THREAD);
  Symbol* failed_type_symbol =
    SystemDictionary::check_signature_loaders(link_info.signature(), current_loader,
                                              resolved_loader, true, CHECK);
  if (failed_type_symbol != NULL) {
    Klass* current_class = link_info.current_klass();
    ClassLoaderData* current_loader_data = current_class->class_loader_data();
    assert(current_loader_data != NULL, "current class has no class loader data");
    Klass* resolved_method_class = resolved_method->method_holder();
    ClassLoaderData* target_loader_data = resolved_method_class->class_loader_data();
    assert(target_loader_data != NULL, "resolved method's class has no class loader data");

    stringStream ss;
    ss.print("loader constraint violation: when resolving %s '", method_type);
    Method::print_external_name(&ss, link_info.resolved_klass(), link_info.name(), link_info.signature());
    ss.print("' the class loader %s of the current class, %s,"
             " and the class loader %s for the method's defining class, %s, have"
             " different Class objects for the type %s used in the signature (%s; %s)",
             current_loader_data->loader_name_and_id(),
             current_class->name()->as_C_string(),
             target_loader_data->loader_name_and_id(),
             resolved_method_class->name()->as_C_string(),
             failed_type_symbol->as_C_string(),
             current_class->class_in_module_of_loader(false, true),
             resolved_method_class->class_in_module_of_loader(false, true));
    THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
  }
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_special_call(CallInfo& result,
                                        Handle recv,
                                        const LinkInfo& link_info,
                                        TRAPS) {
  methodHandle resolved_method = linktime_resolve_special_method(link_info, CHECK);
  runtime_resolve_special_method(result, link_info, resolved_method, recv, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

void LinkResolver::resolve_handle_call(CallInfo& result,
                                       const LinkInfo& link_info,
                                       TRAPS) {
  // JSR 292:  this must be an implicitly generated method MethodHandle.invokeExact(*...) or similar
  Klass* resolved_klass = link_info.resolved_klass();
  assert(resolved_klass == SystemDictionary::MethodHandle_klass() ||
         resolved_klass == SystemDictionary::VarHandle_klass(), "");
  assert(MethodHandles::is_signature_polymorphic_name(link_info.name()), "");
  Handle resolved_appendix;
  Handle resolved_method_type;
  methodHandle resolved_method = lookup_polymorphic_method(link_info,
          &resolved_appendix, &resolved_method_type, CHECK);

  if (link_info.check_access()) {
    Symbol* name = link_info.name();
    vmIntrinsics::ID iid = MethodHandles::signature_polymorphic_name_id(name);
    if (MethodHandles::is_signature_polymorphic_intrinsic(iid)) {
      // Check if method can be accessed by the referring class.
      // MH.linkTo* invocations are not rewritten to invokehandle.
      assert(iid == vmIntrinsics::_invokeBasic, "%s", vmIntrinsics::name_at(iid));

      Klass* current_klass = link_info.current_klass();
      assert(current_klass != NULL , "current_klass should not be null");
      check_method_accessability(current_klass,
                                 resolved_klass,
                                 resolved_method->method_holder(),
                                 resolved_method,
                                 CHECK);
    } else {
      // Java code is free to arbitrarily link signature-polymorphic invokers.
      assert(iid == vmIntrinsics::_invokeGeneric, "not an invoker: %s", vmIntrinsics::name_at(iid));
      assert(MethodHandles::is_signature_polymorphic_public_name(resolved_klass, name), "not public");
    }
  }
  result.set_handle(resolved_klass, resolved_method, resolved_appendix, resolved_method_type, CHECK);
}

Project: jdk11u
File: linkResolver.cpp

void CallInfo::verify() {
  switch (call_kind()) {  // the meaning and allowed value of index depends on kind
  case CallInfo::direct_call:
    if (_call_index == Method::nonvirtual_vtable_index)  break;
    // else fall through to check vtable index:
  case CallInfo::vtable_call:
    assert(resolved_klass()->verify_vtable_index(_call_index), "");
    break;
  case CallInfo::itable_call:
    assert(resolved_method()->method_holder()->verify_itable_index(_call_index), "");
    break;
  case CallInfo::unknown_kind:
    assert(call_kind() != CallInfo::unknown_kind, "CallInfo must be set");
    break;
  default:
    fatal("Unexpected call kind %d", call_kind());
  }
}

Project: jdk11u
File: linkResolver.cpp

void CallInfo::set_virtual(Klass* resolved_klass,
                           Klass* selected_klass,
                           const methodHandle& resolved_method,
                           const methodHandle& selected_method,
                           int vtable_index, TRAPS) {
  assert(vtable_index >= 0 || vtable_index == Method::nonvirtual_vtable_index, "valid index");
  assert(vtable_index < 0 || !resolved_method->has_vtable_index() || vtable_index == resolved_method->vtable_index(), "");
  CallKind kind = (vtable_index >= 0 && !resolved_method->can_be_statically_bound() ? CallInfo::vtable_call : CallInfo::direct_call);
  set_common(resolved_klass, selected_klass, resolved_method, selected_method, kind, vtable_index, CHECK);
  assert(!resolved_method->is_compiled_lambda_form(), "these must be handled via an invokehandle call");
}

Project: jdk11u
File: linkResolver.cpp

CallInfo::CallInfo(Method* resolved_method, Klass* resolved_klass, TRAPS) {
  Klass* resolved_method_holder = resolved_method->method_holder();
  if (resolved_klass == NULL) { // 2nd argument defaults to holder of 1st
    resolved_klass = resolved_method_holder;
  }
  _resolved_klass  = resolved_klass;
  _selected_klass  = resolved_klass;
  _resolved_method = resolved_method;
  _selected_method = resolved_method;
  // classify:
  CallKind kind = CallInfo::unknown_kind;
  int index = resolved_method->vtable_index();
  if (resolved_method->can_be_statically_bound()) {
    kind = CallInfo::direct_call;
  } else if (!resolved_method_holder->is_interface()) {
    // Could be an Object method inherited into an interface, but still a vtable call.
    kind = CallInfo::vtable_call;
  } else if (!resolved_klass->is_interface()) {
    // A default or miranda method.  Compute the vtable index.
    index = LinkResolver::vtable_index_of_interface_method(resolved_klass,
                           resolved_method);
    assert(index >= 0 , "we should have valid vtable index at this point");

    kind = CallInfo::vtable_call;
  } else if (resolved_method->has_vtable_index()) {
    // Can occur if an interface redeclares a method of Object.

#ifdef ASSERT
    // Ensure that this is really the case.
    Klass* object_klass = SystemDictionary::Object_klass();
    Method * object_resolved_method = object_klass->vtable().method_at(index);
    assert(object_resolved_method->name() == resolved_method->name(),
      "Object and interface method names should match at vtable index %d, %s != %s",
      index, object_resolved_method->name()->as_C_string(), resolved_method->name()->as_C_string());
    assert(object_resolved_method->signature() == resolved_method->signature(),
      "Object and interface method signatures should match at vtable index %d, %s != %s",
      index, object_resolved_method->signature()->as_C_string(), resolved_method->signature()->as_C_string());
#endif // ASSERT

    kind = CallInfo::vtable_call;
  } else {
    // A regular interface call.
    kind = CallInfo::itable_call;
    index = resolved_method->itable_index();
  }
  assert(index == Method::nonvirtual_vtable_index || index >= 0, "bad index %d", index);
  _call_kind  = kind;
  _call_index = index;
  _resolved_appendix = Handle();
  // Find or create a ResolvedMethod instance for this Method*
  set_resolved_method_name(CHECK);

  DEBUG_ONLY(verify());
}

Project: jdk11u
File: linkResolver.cpp

methodHandle LinkResolver::resolve_static_call_or_null(const LinkInfo& link_info) {
  EXCEPTION_MARK;
  CallInfo info;
  resolve_static_call(info, link_info, /*initialize_class*/false, THREAD);
  if (HAS_PENDING_EXCEPTION) {
    CLEAR_PENDING_EXCEPTION;
    return methodHandle();
  }
  return info.selected_method();
}